package com.guigu.gulicommon.config.threadPool;

import com.guigu.gulicommon.constant.enumes.ThreadPoolWaitPolicy;
import com.guigu.gulicommon.tools.ThreadPoolTool;
import lombok.extern.log4j.Log4j2;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.scheduling.annotation.EnableAsync;
import org.springframework.scheduling.concurrent.ThreadPoolTaskExecutor;
/**
 * 线程池配置类
 * @author 陈俊杰
 */
@Configuration
@Log4j2
@EnableAsync
public class ThreadPoolConfig {

    @Value("${async.executor.thread.core-pool-size}")
    private int corePoolSize;
    @Value("${async.executor.thread.max-pool-size}")
    private int maxPoolSize;
    @Value("${async.executor.thread.queue-capacity}")
    private Integer queueCapacity;
    @Value("${async.executor.thread.name-prefix}")
    private String namePrefix;
    @Value("${async.executor.thread.execution-handler}")
    private Integer executionHandler;

    @Bean(name = "asyncServiceExecutor")
    public ThreadPoolTaskExecutor  asyncServiceExecutor() {
        log.info("正在启动线程池.....");
        VisibleThreadPoolTaskExecutor  executor = new VisibleThreadPoolTaskExecutor();
        //配置核心线程数
        executor.setCorePoolSize(corePoolSize);
        //配置最大线程数
        executor.setMaxPoolSize(maxPoolSize);
        //配置队列大小
        executor.setQueueCapacity(queueCapacity);
        //配置线程池中的线程的名称前缀
        executor.setThreadNamePrefix(namePrefix);
        // rejection-policy：当pool已经达到max size的时候，如何处理新任务
        // CALLER_RUNS：不在新线程中执行任务，而是有调用者所在的线程来执行
        executor.setRejectedExecutionHandler(ThreadPoolTool
                .getThreadPoolWaitPolicyByCode(ThreadPoolWaitPolicy.values(),executionHandler));
        //执行初始化
        executor.initialize();
        log.info("线程池启动成功....");
        return executor;
    }
}
